Pipe coupling



FIG. 1 is an isometric view from one end thereof,

FIG. 2 is an isometric view from the opposite end thereof,

FIG. 3 is an isometric view similar to FIG. 1, but from beneath,

FIG. 4 is an isometric view similar to FIG. 2, but from beneath,

FIG. 5 is a side elevational view thereof, the opposite side being a mirror image,

FIG. 6 is a top plan view thereof,

FIG. 7 is a bottom plan view thereof,

FIG. 8 is an end view thereof, taken from the left end of FIG. 5; and,

FIG. 9 is an end view thereof, taken from the right end of FIG. 5. 

CLAIM The ornamental design for a pipe coupling, as shown and described. 